An HDL (hardware description language) is a computer-based language used to describe digital systems and logic circuits in a textual format, resembling a programming language but oriented to hardware. HDLs like VHDL and Verilog allow designers to model circuits that are too complex to design manually. HDLs can represent logic diagrams, truth tables, Boolean expressions, and abstract system behavior.

1. HDL
Hardware Description Language

2. HDL
 Manual methods for designing logic circuits are feasible
only when the circuit is small. For anything else (i.e., a
practical circuit), designers use computer-based design
tools.
 A hardware description language (HDL) is a computer-
based language that describes the hardware of digital
systems in a textual form. It resembles an ordinary
computer programming language, such as C, but is
specifically oriented to describing hardware structures
and the behavior of logic circuits. It can be used to
represent logic diagrams, truth tables, Boolean
expressions, and complex abstractions of the behavior of
a digital system.

3. HDL
 There are two standard HDLs that are supported by the
IEEE: VHDL and Verilog.